PSG was considered to be the most competitive team this season and their native token trend in the market even since Messi joins them also proves it.
I also believe Barcelona not to have much chance this season but still, we shouldn't make any conclusion now because we don't know if the team is ready prepared for this day ever since the club executive had a misunderstanding with Messi then.
Not only did they have a problem with Messi, now another with Aguero. The player was promised that he would play alongside Messi, but he left. There was a rumour, I'm sure they were mentioned here, they say that because of this situation, he also wants to leave right in this transfer window. From all this follows the conclusion that the Barca will be weak this season, especially if Sergio leaves. And if he doesn't leave, he'll play poorly